-ey a-a a-c aaa aac aae aaf aas aay ac- aca acc ace acf acs acy aea aec aee aef aes aey af- afa afc afe aff afs afy as- asa asc ase asf ass asy ay- aya ayc aye ayf ays c-- caa cac cae caf cas cay cca ccc cce ccf ccs ce- cea cec cee cef ces cey cfa cfc cfe cff cfs csa csc cse csf css csy cya cyc cye cyf cys eaa eac eae eaf eas ec- eca ecc ece ecf ecs eea eec eee eef ees eey ef- efa efc efe eff efs es- esa esc ese esf ess esy eya eyc eye eys faa fac fae faf fas fay fca fcc fce fcf fcs fcy fea fec fee fef fes fey ffa ffc ffe fff ffs ffy fsa fsc fse fsf fss fy- fya fyc fye saa sac sae saf sas say sca scc sce scf scs se- sea sec see sef ses sey sfa sfc sfe sff sfs ss- ssa ssc sse ssf sss sy- sya syc sye sys yaa yac yae yaf yas yay yca ycc yce ycf ycs ycy yea yec yee yef yes yey yfa yfc yfe yff yfs ysa ysc yse yss ysy yyc yye yyf yys yyy